package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 对明文密码进行md5加密 <×TO-DO 后期需要进行md5加密，然后再进行比对>
        password = password + username; //加盐（salt）,原密码为123456
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        //System.out.println(password);

        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);

        //设置默认密码并进行MD5加密
        String password = PasswordConstant.DEFAULT_PASSWORD + employeeDTO.getUsername();
        employee.setPassword(DigestUtils.md5DigestAsHex(password.getBytes()));
        //设置账号默认状态为启用
        employee.setStatus(StatusConstant.ENABLE);

        /*公共字段交由切面类AutoFillAspect 赋值*/
        //设置当前创建时间和修改时间
        /*employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());*/

        //设置当前记录的创建人id和修改人id（即当前登录用户的id），
        // 从线程局部变量中获取（JwtTokenAdminInterceptor中存入）
        /*employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());*/

        //新增员工数据
        employeeMapper.insert(employee);
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //使用pagehelper工具设置分页参数
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //mapper查询
        Page<Employee> employeePage = employeeMapper.pageQuery(employeePageQueryDTO);
        //获取总记录数与分页记录集合
        long total = employeePage.getTotal();
        List<Employee> records = employeePage.getResult();
        //返回封装结果
        return new PageResult(total, records);
    }

    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //创建员工实体对象
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                /*公共字段交由切面类AutoFillAspect 赋值*/
                /*.updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())*/
                .build();
        //调用 通用的更新mapper
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        //密码脱敏
        employee.setPassword("******");
        //返回结果
        return employee;
    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        //创建员工实体对象,拷贝属性
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        /*公共字段交由切面类AutoFillAspect 赋值*/
        //设置更新时间与更新人id
        /*employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        //调用 通用的更新mapper
        employeeMapper.update(employee);
    }

}
